Ore-roasting furnace.



T. EDWARDS. ORE ROASTING FURNACE. APPLICATION FILED OGT.18, 1910. RENEWED JUNE 3, 1912.

1,036,814, Patented Aug. 27, 1912.

8 SHEETSSHEET l.

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Patented Aug. 27, 1912.

I 'f I T. EDWARDS. ORE ROASTING FURNACE. APPLICATION FILED 001 .18, 1910. RENEWED JUNE 3,1912.

T. EDWARDS.

ORB ROASTING FURNACE. APPLICATION FILED 0GT.18,1910. RENEWED JUNE 3,1912. ,O36,814.

Patented Aug. 27, 1912.

8 SHEETS-SHEET 3.

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ORE ROASTING FURNACE APPLIOATION FILED ()(JT.18,1910v RENEWED JUNE 3, 191

Patented Aug. 27, 1912.

8 SHBETS-SHEET 4.

ZVzomas Z/d tufa bL M 4 1 AQMWIMM T. EDWARDS. ORE ROASTING FURNACE.

APPLICATION FILED 001218, 1910. RENEWED JUNE 3, 1912.

Patented Aug. 27, 1912.

8 SHEETS-SHEET 6.

WWW X T. EDWARDS.

ORE ROASTING FURNACE.

APPLIOATION FILED O0T.18, 1910. RENEWED mm: 3,1912.

1,036,814, Patented Aug. 27, 1912.

8 SHEETS-SHEET 6.

T. EDWARDS.

ORE ROASTING FURNACE.

APPLICATION FILED 001'. 18, 1910. RENEWED JUNE 3, 1912.

1,036,814, Patented Aug. 27, 1912.

8 SHEETS-SHEET 7.

Fig. 12

T. EDWARDS.

ORE ROASTING FURNACE.

APPLICATION FILED OOT.18, 1910. RENEWED JUNE 3, 1012.

1 O3 6 8 1 4, Patented Aug. 27, 1912.

8 SHEETS-SHEET 8.

par flue/mew SRSIFATES PATENT OFFICE. TKOHABEDfiLRDQ, 0' mm, VICTORIA, AUSTRALIA.

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lpeotilostien of amen 2min.

Patented Aug. 2'7, 1912.

Application tiled amber is, 1910, lei-tolls. mass. "lenews'd June a, ma. smn in. 101,432.

To all whom it may concern:

Be it known that I, THOMAS Eawaaas, a sab'ect of the King of Great Britain and llul tlllti, &c., i'esidin at Ballarat, in the State of Victoria, ommonwealth of Australia, have invented certain new and useful 1m rovements in Ore-Roasting Furnaces; an I do hereby declare the fol owingtolbe a full, clear, and exact description vof .the invcntion, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention comprises improvements in ore roasting furnaces and the like. struction is applicable, but nothmited, to cases where .the space available is-restricted in length. My furnace is efi'ective, easy to work, and allows of economical operation. The react when treating auriferous or argontiferous ore allows o comparatively igh extraction of gold, or silver, .or both.

I provide superimposed hearths; but may heat and use only one hearth; or two or more (not in communication witheach other are heated .and usedat once. Each .heart has an inde endent end fireplace, at the the next but in an oblique line, therefrom. Rabbles are rotated, but notallatone speed;

they are in one or more lon 'tudinal rows, with stems projecting into the: ttom hearth. The same mechanism that drives the ,i'abbles drives ore feedin means .to supply .the "(or each.) hearth, an ore discharge-(m dropper means. 'j 5 The raw ore or othermaterialds,ai tomatically introduced in predetermined-quantities, and in an advantageous .and.regular manner, so that the tem rature-withimthe furnace will not unduly actuatmbyunevem ness in the distribution .of the oretasitatravols the length o! the tarmac. .The screw feeds some inventorsuse-lsre defective. The ,ore .dischargeor, drop in ,meansjs arranged to readily'permitp .t e'aileaniag and ronowalyot parts, and to,,agt.as ,s,;du,s prevonter. Any current ,of air.- passing up into the furns fiithro i ha -plain discharge hole would-carry value is netallifemumdust m t a t a fwktbm sh the are m d ut at th rletterea cathaifi es My con- 1 Thiswould involve loss, asroasted ore thus carried off Ibecomes mixed with ai'senical or other flue deposits. If there is a plain drop of hot rabbled ore from one hearth to another, undue dust is also created in the furuses, and art'becoines lost in the fines.

Any sui able material is usable in construction; .thus common brick furnace bodies are suitable, except about the fireplaces, and to about the second rabble therefrom, where firebridk is suitable; rabbles and other metal work are ordinarily of cast iron, or steel, as will be well understood.

In the accompanying drawings my construction is illustrated; some known features of furnaces .are :also shown for more comfurnace at the replace end; Fig. 2 a plan at the flue end. F i rtsatthe fire it 3 shows in side elevation ce end; Fig. 4 in side eleivation parts at he flue end, and an intermediate portion; Fig. 5 parts at the flue end in vertical cross section; Fig. (l a side elevation of arts at the fireplace end; Fig. 7 arts at t e flue end, in vertical section; ig. 8 a vertical cross section. Fig. 9 shows a water rabble in sectional elevation, and

-Fig. 10 shows in vertical section, part of the furnace feeding means. plan view, a dia am .of the rabble stem in 1g. 9 with the eel; adjusted to be one not directly above the other. Fig. 12 is an end view in vertical section through an ore hiu of mypreferred ore fesder' Fig. Ill-is a side elevation of the feeder {ant Fig. 14 is a plan view of the said feeder with the ore bin (11- l qpper atop open. Fig. 15 is an end elevation .of the ore'droppcr, whilc Fig. Iii-is a plan view, and Fig.1! '(partly in vertical 3 sectio nyafside BlGYfiliiOllillCIGOf and Fig. 18 1 exhibits. modified, details.

iThB inveintion 1 isdjiot limited ltlo the dcs gas nu m erso rts or sizcs i ustrated; the-stialesin these ti'gures difler.

' :In these .drawlngs, A and B are furnaces havin longitudinal hearthsl, 2, one above them or, withradjoiningend fireplaces 3, 4, with doors tQ,',4;3,-on ,tl es'ame side, The e Fig. 11 shows, in

doors are suitably movable as by sliding in iron frames, or suitable grooves-and have balance weights 42', 45, connected by chains or ropes passing over pulleys 41, 44.

53 is a firebridge, wider than that (as 52) below it, so that one furnace as B overlaps that under it as A. While reser'vin an overlafp however, there may modi cations o iirebridge'and other details.

Aslipits 3, 4,,ar e provided with any suitable frames and doors 46, 47. The fire boxes have air inlets to facilitate combustion, one shown at 48 into furnace A, and one at49 into furnace B." A door with suitable frame is side of t e lower furnace and a ova it a door 61 at each side of each hi her-furnace; Any door is opened when air a mission and access to the hearth is reti uired.

Each hearth is suitab arranged to allow of ore reaching its ischarge end, the furnace foundations being advanta eously built portion above and portion (at t e fireplace end) in the ground. Under thebot tom furnace are recesses 5 allowing direct access to rabblesupports from the furnace side. When there are two lines of rabbles, there are recesses 6 along the other side, or recesses may pass right across.

The upper furnace to carries metal, or

any suita 1e frames, rai and connections which .sup ort gearing. The drawings do not show a l the framing; but various sta s, bolts, angle irons, and strengthening rails, are marked 22, and there are olts 54,-bucl; stays as 55, lates 70 other staysbtl at intervuls (Fig. 4 the bolts 57 with nuts or other fastenings, and longitudinal stays 69. Bearings or the like as 80, 81, support rabble spindles.

At. 68 are superimposed or adjacent side the laces with side air holes 64, to the lower,

an to the up er one. 10 is the main Hue; passa e 82 to it from furnace A is regulate by amper 10, gas- .sage 88 from furnace B by damper 17; t ese dampers are ad'acent so that either can be rendil attendc to, and they 'pass through suitab e recesses.

82388 are end walls.

60 is access. means to flue'10.

The ore discharge is'by. metal'or other dropper casihgs'or'passagew'a s, inclined or rerticah'or partlyeach .whic extend from 8-as.the"'s'eale isso' 'sin the hearth-orahearths. he droppershuwn in Figs." 15 t'oj18- is for "one hearth, .blltjille application to a plurhlit 'ylybf superimposed hearths ;is,obv1oi i it not; shownjin Fig. l [but theposition is indicated by the pa'rt's'th'ije shown "of the ,ward y; extending fcasipgyfll l'ifef ree'tangu'-, la'ifijorother; cross section, open when in use rovided'near the firebrid e" at each (and altogether if desired) at each end; and of. any length and cross sectional area, in one iece or in sections joined or secured toget er, as by flan es 112. Casing 111 has anyisuitable vertica or inclined top passage to it from a hearth, as through the furnace Wall as dotted at 111. The casing shown extends downthe furnace side, built or let thei'einto, but ma stand out therefrom extending in any direction desired. It may be arranged to extend from below one hearth within a furnace to any suitable point over a lower hearth.

When using superimposed hearths, there will (in some cases) be one or more distinct dropper casings from each with appropriate flaps or valves below described, and operating means. The working of the furnace hearths, as belon ing to two or more separate or indepen ent furnaces, then allows two or more separate lots or kinds of ore, not to be mixed, to be' treated simultaneously yet separately, which course saves both time and expense.

Along each hea'rth are holes at both sides with iron or metal frames and closing doors 84 in the lower, and 35 in the upper foriiace for sightin and other usual purposes.

Main longitu inal shafts .23, 2-1, are provided, one for each line of rabbles, with suitably geared connections as toothed bevel pinions 18, with at the fireplace end two arger pinions 19. Each inion ears with a bevel wheel 20 (or at t e'firep ace end a bevel wheel as 21) mounted on a rabble spilldle. The rabble spindles at the fire end travel faster;i

move aroun twice as fast as do the other rabble spindles. This brings the ore into "-ae arenon-water rabble spindles, and 37 waterrabble spindles.

arisa ipe'by'which water is carried to branches- 2 (havin "suitable valves) into the tops of rabble s indies 37.

.Two lines of rab le stems extending into .each furnace are shown, non-water rabbles marked'aand water rabbles 8. The rabble sten' fs have integralpartitions when intended for coolmg'purposes Wind-all desired rabble or ad ustably connected between the respective' set on sa1d'steins,and above the upperfect as at 8"and'8", so that according to and cause rabble feet there toill) . stem has a plurality of stirring feet 89, 90.

the positions in which the parts are bolted together the rabble feet will be placed, when desired, that is not one necessarily above ar other. A special adjustment of this kind 1 is indicated by Fig. 11, and is in some cases i important.

71, 72, 73, 74, are overlapping paths traveled by-the shoes at the rabble feet ends, as per arrows in Fig. 2 where part of the furnace top is shown broken away.

All ore travels toward the same end in each hearth. Each rabble stem is inserted or removed through frames, casings, metal boxes, or apertures, as at 11, 12, in each furnace crown or top; these apertures are to be made of any suitable sizes. The water rabbles discharge water to pans 13 having outlet pipes 14, 14, to a gutter, launder, or pipe 15.

The bottoms of the rabble spindles enter apertures 10] in the lower hearth and terminate in sockets (3G resting, somewhat be low said hearth, on bearing posts 67, which have bearers (38 in recesses 5, (3. Each rabble but not necessarily set one directly above another. The Water rabble has screw plugged apertures 91 and at each foot end 92 to enable water passages 93, J4, J5, to be cleaned out. Each water rabble stem has a longitudinal partition 97, and each foot a longitudinal partition 98, so that water descends and ascends, and passes to and fro z' ong each rabble foot and escapes by a branch 38 extending obliquely and having (see Fig. 3) a curved or bent nozzle 88* fitted therein to allow of discharge to pan 13 or the like.

The frame or casing 11 has grooves for a slide 99 inserted after the rabble is in posi- 1 tion and used to prevent fall of material from above. Frames 12 also have slides; when desired. ln the furnace sides are special apertures 100 to allow the slides to be i inserted or removed.

\Vhen the rabbles are in place (their feet l having at will stirring shoes as 96 Fig. 8) k the crown casings or apertures 11, 12, are closed. as by blocks or bricks at 102 Fig. 8, and above that. at will, sand. At the bases 1 I03 of casings as 12 are flanges to support i the said blocks: the latter are at will dis 1 pcnsed with under slides or plates 99. Sand l forms a useful upper surface in continul ation of the .-urrounding hearth, also covl cred with any suitable layer of quartz sand, or the like. 104: in this manner, however, the furnacelnan will follow any practice he l deems suitable. (ire receivers 84, feed 1 any suitable Std-"W eonw iers. as 86 in inle l lambers oE' t'ibes 5 t (Fig. 10), so tl at f om the inner end o each feed tube or hamber as tvi' extending into the furnace side, the ore drops wnere desired upon a! hearth. Parts S4, 87 appear in Figs. 1; to let, where 5% is a hopper or ore bin. of any appropriate shape, dimen ion and materials (as of wood). At its base are a series of shafts bl), shown parallel. having screw propeller blades. or conveying means. The shaft ends turn in bearings outside the hopper, as at 5%. Above the :llll is are movable boards or slides 59 (one shown warmed), to prevent ore charged into the hopper from injuring or clogging the con'v'eyers', each slide or board is adjustable to al ow ore to pass to the conveyers as 1". piircd. Any suitable slide handles or il 't'(.. t'lt not shown, are provided. \s v hafts .33 revolve, the screw blades push ore from hopper So to a transverse hopper 58*, having a screw conveyer, as shaft 59 with screw propeller blades. Each shaft .19 has a gear whee! G, these being in mesh, and the huddle shaft carries also a worm wheel, ll, in gear with another C, on spindle J, driven by end sprocl t wheel K, having chain L moved by sprocket wheel hi, on shaft N having sprocket wheel 0. turned by chain 1 passing over sprocket wheel (3 (dotted in Fig. 13, it being behind the hopper) mounted on longi tudinal main shaft 2;; of the furnace; but any other suitable part of the rabble driving mechanism may be used to drive the feeder. I place mechanism in some cases to feed into both sides of the furnace, using shafts 23 and 2*, but illustrate feed at one side only.

The delivery end of casing 58 has a base outlet to tube 84, whereby ore is fed to cas ing 87, having feed shaft 82, which has a gear wheel S2*--m Fig. ll-in mesh with a gear wheel 82 on shaft D, driven by sprocket wheel R- actuated by chain S. On shaft N is a sprocket wheel M driving a chain M actuating sprocket wheel M on shaft 59 and on shaft J is a sprocket wheel T actuating chain h.

The convoyers in chambers .38, 58 87, ro-

tate simultaneously; their speeds depend on the gearing and may be aried. The rate of revolution of shaft 8'2 is greater than that of shaft 59 and that of the latter is greater than that of shafts 59. Shaft 82 may in practice revolve 10 times to one revolution of main shaft 23, so that ct'unparatively 1 small feed inlets to the furnace side sutlice.

So that the quantity of ore fed in may be regulated. each gear wheel G. on the two outer shafts of those marked it), is provided with a clut h or suitable connection lfl. hav ing actuating arm F or lever pivoted as at F when desired either or both said. wh e G is, by mov ng arm F, disengaged from the middle wheel G, and thus rotation (if on or more conveyer shafts is stopped.

As a simple screw conveyer fee-ti may. as in Fig. 2, provide any suitable gear wheels 75,76 to drive a shaft 77 and thereby sprocket Wheels 78. T and chains 50 aofl 81, (Fig. 4), which turns sprocket Wheels on coi'iveyer spindles 83. wheels may be changed to produce the is of feel (lesllQail, ()e-linary The sprocket l screw l ce-Pl loo l veyers do not provide closed clianibcrs :7.

88, adapted to be opened and cleaned i i the manner shown by Fig". 10. in which end casting S (having bearings for the conveyer spindle) attached as by removable bolts In the aforesaid casing 111 of the dropper or roasted ore discharge means, there are arangcd, crossing or closing it, and one above another. any suitable number oi? ila valves, a pair as X. Y, being shown with respective spindles 106, 107. These valves so open and close that when one is open its neighbor or neighbors will be c. 1 lines show open positions. Each is kept closed the oy ening and cl ation occn 'iying only a short time. each valve is, extending around the axn inner Wall, any suitable abutment, as hori- Zontal r1b 105 (or it has opposite sides in- 37, and work as long as desircvl A h r zonal-a1 flap may be located to form part of a hearth to discharge therefrom. but Where desired it is so placed that a slide over it, not shown, will be moved suitably when discharge is desired The discharge passage v,

in one or more "rails, any able door or co r lfl8-----" otherwise Sullfi f j comic on the casing zicl; may have prop b screw threaded y us or bolls; the so or may be removed or (a l and the casing int r; he attended plate 3.08} and 1 1.21 or like snppcn retain flaps in Working position,

Spindles 106, 107, project through the casing, and have connected to them cranks 110 and 109 respectively, coimected to rods 110", 109 (the latter dot te in Fig. 15). jointed or connected to sespective levers as 114, 114, pivoted as at 125 and 115 respectively, to any suitable supports on the fan mate to as logs on framing .ixales i projeetmns 126, 127, secured to these The flaps are operated by mechanism 3 connected to the spindle of rotating rabble f till i l l l l s or suitable member if! .1. which lit against the face of a Cl sl: or iiate ll? lieye-tl to rabble spindle 37. The

the latter has 1m; on or cam is, or lllu lilio. Any of the limp operal;-

eonneciions may be made adjustable, 7 1 spindle 3T revolv 1 it 113N193 disl-z 0r lli'iil 117. the latter keeping in contact with nwinbcrs 124. 125, each of which is in turn ale inesssd and raised by the action of cam iii part Fig: 15 shows Wheel 12 at a moment of depression, on the point of reinto to hornml position. The parls of the mechanism are lo be adjusted relatively to one another that, the e it of {he spindle rotation is to oscillate le\ ill, ill, in turn, musing movement of re llll 105?. and cm! lit)" lt f and spintl 106, M37,

' il- .vll open and oh. 7 ils remains elosed, l w tlaps u: n il to each casing and lllllll some cases, connia-tml by cranks i) rotl 110. and the second aml fourth to rod 109. Either by the cal of cain iii; aml m mbers 12%, i2), dish 'llT, lhci would he an fll'jUYl it. and any t of ihe fin- I nliicll the Joba we m chanism by oi s are izitisnatel'v si-anseil to l t etc mo be ai-ran' vil in work my anon 5 mmns are Roi new hle of the fnmave; Eit'l. at v= l ne nibble spindle usable to allow working of dropping mccha iisms for more than one heai'lh, fi' lea the dr pping iilevice, the ore r i he received as desired.

nvention hearth 1 roasting wees. a iron-'21 havi 3 SW ills of zaper for insenion and rerhoval of rabbles in said apertures,--:lides or plates snornrted in or by said, casings, and furnac side f ertur or insemion and re moval of the said she 5:". 1r. l-oi'ig iiutl al '3 re st r 1 fawn of apertures ior rabble stems, in c .mbinalion with slides or means insertible from the furnace sides to z t in closing said apertures, v

Soperim posed non ;(-mm when! mg over-- lapping furnaces, having 1 tudinal hearihs, and at one end and side imlegwntb enl tlreplaees oblique to one :lnotliei; and, a! lhe other, independeml line exits with 'kuzent dampers substantially as described.

7 ierixnposed ore roasting furnaces,

having firebridges of different width, which overlap, with fireplaces at different heights in oblique alinement.

5. A pair of superimposed independent roasting furnaces, a fire place communicating with the lower furnace, a second fire place communicating with the upper furnace above the first fire place, and an air passage leading from beneath the grate of the second fire place to a point above the 10 grate of the first fire place, substantially as described.

In Witness whereof I have hereunto set my hand in the presence of two witnesses. THOMAS EDVARDS. Witnesses:

BEATRICE M. Lowe, Anfcn M. HOLT.

Copies of this patent may he obtained for five cents each, by addressing the Commissioner of Iatente, Washington, D. 0. 

